Street-sweeping machine.



J. A. SCHROEDER.

STREET SWEEPING MACHINE.

APPLICATION FILED JUNE I0, 1916.

Patented 0015-. 23,1917.

3 SHEETS-SHEET I MIQ JACOB A. SCHROEDER, 0F PIQUA, oHI o'; Assrqnoaro MARY sonnon nnn, or 'PIQUA, onro.

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Specification of Letters Patent. Patented Oct. 23, 191 '7.

Application filed June 10,1916. Seria1No.102,902.

To all whom it may concern: t

. Be it known that I, J ACOB A. Sc -monnnn, citizen of the United States, residing at Piqua, in the county of Miami and State of Ohio, have invented certain new and useful Improvements in Street-Sweeping, Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and'to the let ters and figures of reference marked there on, which form a part of this specification.

This invention relates to certain new and useful improvements in street sweepers. The object of the invention is to provide a highly eflicient machine of this character which possesses the structural characteristics and advantages tobe hereinafter more fully described in connection with the accompany ing' drawings.

Referring to the in general terms, Figure 1 is a plan view of the main portion of the machine onthe line 1-1' of Fig. 2, parts of the machine such as the wheels and the power generator which are unnecessary for the purpose of illustrating' the improvements being; omitted from this view; Fig. 2 isa sectional elevation on the line 22 of Fig. 1; Fig. 3 is a rear elevation'of the machine on the line 3-3 of Fig. 2; Fig. 4 is a sectional elevation of the devices for holding the dirt receiver or pan firmly in a position to receive the dirt from the broom; Fig. 5 is a side elevation similar to Fig. 2 showing a modification in the means for directing the movement of the broom; Fig. 8 is a rear elevation of Fig. 5; and F ig. 7 is a view of the modification similar to Fig. 5 in which the broom is .being elevated toreturn in the upper rearward path of its movement tothe position in which it is shown in Fig. 6.

In a detail description of my invention,

similar reference characters indicatecorresponding parts. The frame work of the machine is constructed of side angle-bars 1'1 which are suitably connected by transverse bars 2.2 which are united'in a manner similar to uniting the parts of a chassis. Rigidly mounted on the two frame members 11 are posts Si-3 which incline toward each other and are united at theirupper ends by accompanying drawings,

blocks H which firmly hold said upper ends connected in the form of frames. The interposed blocks 44e'of each pair of posts 3 3 .areunited by a tie-rod 5 by means of which the two pairs 'of'posts 33 are rigidly supported at their upper ends. Pivoted'to the outer side of each of the blocks 4+4 is an antifriction ro1ler,6., 7 designates the broom which, from Fig. 3 it will be seen, is substantially wider than the frame of the machine. This broom includes aback 8 attached to whiclnnearthe ends thereof, are. two metallic channel bars 9-9, the channel sides of these barsbeing inwardly and facing each other, as shown in Fig. 3. a The upper ends of said. channel bars 9-9 are united firmly by means of a cross-bar 10. The antifriction rollers 6 enter the channels of the bars 9 and serve to hold the upper ends of said bars properly on a fixed pivot as said bars oscillate back and'forth in the operations ofthe broom 7 The ends of the back 8 of the broom are provided with antifrictionrollers 11 which are guidedintracks in two side members 12. The rearward portions of these tracks are horizontal while the forward portions incline upwardly. In the forward movement ofthe broom 7 from the position shown in Fig. 2, it is guided in the horizontal tracks until it reaches the inclined dirt pan 13 at which time .it is elevatedby the inclined portions of the tracks to sweep the dirt upon the pan. 13' and into a dirt receptacle 14, the dirt'being forced into the receptacle'fromsthe panl3'. Any suitable conveyer may beemployed within the receptacle 14 to receive the dirt as it is swept from the incline 13. In the pending application of Jacob A. Schroeder, Serial No. 7 5,221, a suitable form of conveyer is there my present means. The side members 12 are rigidly attached at their opposite ends to arms 15 whichconverge at their upper ends and are. united to oscillating levers or walking beams 16 by pivots 17. The levers 16 turn upon pivots 18 which are mounted on the superstructure consisting of the posts 3-3 by means of bearings 19. The inner adjacent ends of the levers16 are united by means of ,a pin which supports an interposed roller 20 which lies in the path of a cam 21 fixed to a shaft 22. Upon the shaft 22, near each end thereof, a disk 23 is rigidly mounted. The'shaft 22 is supported upon bearings 24: which are mounted upon the frame members 11. Carried on each of the disks 23 and on the outer face thereof near their circumference is a pin or antifriction roller 25 each of which antifriction rollers lies within its respective channel of the broom arms 9-9. As the disks 23 rotate, the broom, through the engagement of the rollers 25 with the arms 99, is moved backward and forward, the forward movement being the sweeping movement and the rearward movement being the nonsweeping movement, and during which the broom is elevated. The shaft 22 is driven to rotate the disks 23 in the direction of the arrow, Fig. 2, from a power shaft 26 which is driven from the source of power such, for example, as a gas engine or other suitable motor which is not shown owing to the fact of its being a well known medium for power generation. The shaft 26 is suitably journaled in a bearing 27 that hangs from a cross-frame member 28 that extends between the side frame members 1-1. A bevel pinion 29 on the main driving shaft 26 meshes with a similar pinion 30 on a short shaft 31 which is suitably journaled in bearings on the adjacent parts of the frame members 1 and 28. Upon the shaft 31 a sprocket wheel 32 is mounted which drives a sprocket chain 33 which reaches around a sprocket wheel 3% on the shaft 22. hen the broom 7 completes its forward or sweeping movement, it is elevated with the tracks 1212 and is retained in such elevated posi tion until it is returned to the initial point of its sweeping operation, as is shown in Fig. 2. This elevation occurs at the proper time through the action of the cam 21 on the levers 16 through the engagement of said cam with the roller 20. During this elevation of the tracks 12-12, which is only sufficient to raise the broom from the ground, the oscillating or reciprocating movement of the broom 7 through the action of the rollers 25 on the channel bars 9 is not retarded or interfered with. The tracks 1212 are guided in this movement by means of guide members 35. The extreme ends of the said guide members 12 are bifurcated to receive the guide members 35, said guide members 35 being extended portions of arms 36 which depend from the cross-frame members 2-2. The dirt pan 13 is securely held in the position shown in Fig. 2 just as the broom 7 is entering upon said pan. After the broom has entered upon the pan, said pan will be firmly held in a receiving position thereby against any obstructions over which it may pass. The said pan is held in the proper position to receive the broom at that time by means of two links 37 which are pivoted at 38 to the pan near the ends thereof. The upper ends of the links 37 are pivoted to links 39 which are rigidly connected to a shaft 40 nae-apes journaled in suitable bearings secured to the forward cross-member 2. Projecting downwardly from near the middle of the shaft a0 is an arm 41 which is fixed to said shaft 40. This arm &1 lies in the path of a cam a2 which is mounted on the short shaft 31 and which is driven simultaneously with the shaft 22 from the main shaft 26.

Referring to the modification of the means for elevating the broom 7 during its rearward movement and as illustrated in Figs. 5, 6 and 7, the guide tracks for the rollers 25 of the broom are arranged on the inner sides of two side plates- 13 which de pend rigidly from the frame members of the machine. These side plates have upper and lower channels 14: and 45 with an intervening forwardly inclined channel T6. The lower channels 15 and 16 guide the broom in its forward or sweeping movement and the upper channel 4E4.- guides it in the rearward or non-sweeping movement, said tracks forming cam races in which the rollers 25 of the broom travel. As shown in Fig. 5, the broom 7 is starting in its forward or sweeping movement having just descended from the rearward upper channel 44. In Fig. 7, the broom 7 is shown at the completion of its forward or sw eping movement with the rollers entering the upper channel 44: from the inclined channel L6. As before stated, the plates .43 are stationary and likewise the channels therein which guide the movements of the broom. In this miodification, the disks 23 are provided with cams 47 which are united to or projected from the sides of said disks near the circumference thereof and out of alinement withthe periphery of said disks. Pivoted within the channels of each of'the bars 9 isan antifriction roller 48. On each of the disks 23 an antifriction roller a9 is pivoted. These latter rollers project into the channels of the bars 9 and reciprocate the broom in a manner similar to the antifriction rollers25 which were described in connection with Figs. 1 and 2. The purpose of the cams 17 and the rollers a8 is to elevate the broom from the forward end of the incline channel 16 into the return channel L4, as will be clearly understood from an inspection of Fig.7. The curvature which connects the upper and lower channels 44 and 45 serves as a cam to guide the rollers 11 into the lower channel 45. From the descriptions thus given, the operation of the broom 7 will be readily understood. In its forward movement, from theposition shown in Fig. 5 to that shown in Fig. 7, the broom is effective in sweeping the dirt from the street up the incline pan 13 and onto any suitable form of conveyer within the transverse receptacle 14. The rotation of the disks 23 causes a continuous reciprocation of the broom in the curve of the two paths where the plates 43 are employed and in two paths in the event that the side members 12 are employed, said side members being reciprocated vertically, as hereinbefore described.

Having described my invention, I claim.

1. In a street sweeping machine, the com bination with a running gear, and a frame supported on said running gear, of a broom having handles mounted upon said frame in a manner which permits of the broom being reciprocated in two horizontal planes one above the other, rotating members having means cooperating with the broom handles to reciprocate the broom in the said two planes of movement, and means for guiding the broom in said planes of movement comprising members on each side of the running gear provided with guide-ways with which the broom is connected.

2. In a street sweeping machine, the com bination with a running gear, of a broom mounted upon handles pivotally supported relative to the running gear, tracks arranged on each side of the running gear in which said broom moves in lower and upper horizontal planes, disks having means thereon engaging said broom handles and imparting a reciprocating movement thereto, and means for elevating said broom handles and therewith the broom from the lower to the upper track at the terminal of each lower horizontal movement.

Copies of this patent may be obtained for five cents each; by addressing the 3. In a street sweeping machine, the combination with a running gear, of a broom the handles of which are pivotally mounted on said running gear, rotatable disks having elevating the broom from the lower track to the upper track at the terminal of its forward movement in said upper track.

4. In a street sweeping machine,- the combination with a frame supported upon wheels, of a broom having handles pivotally supported on said frame, rotatable disks having rollers thereon engaging said handles and imparting reciprocating movement to the broom, upper and lower tracks on each side of said frame adapted to guide the broom in its forward and rearward movements, and cams adapted to engage said broom handles at predetermined times to elevate the broom from the lower to the upper track. 1

In testimony whereof I afiix my signature, in presence of two .witnesses. JACOB A. SCHBOEDER. Witnesses: 1

M. GALLowAY, M SIEBLER.

"Gommissiofier of Patents,

Washington, D. G. 

